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Acids turn blue litmus red because what is their nature?

Answer and explanation

Correct answer: Acidic

Litmus is an acid-base indicator. An acidic substance changes blue litmus paper to red, whereas a base changes red litmus to blue. Since the question describes the blue-to-red change, the substance has acidic nature and option A is correct. Neutral substances show no characteristic litmus change, and metallic is not an acid-base classification here.

Related tags

ScienceClass 10Acids Bases SaltsBlue LitmusAcidic NatureAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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